Ikemen Muscle, son of Kinniku royal family member Harabote Muscle, operates as a calculated architect behind the resurgence of the Chojin World Grand Prix—a storied wrestling tournament tied to his lineage. Driven by twin ambitions of dismantling Mantaro Kinniku’s credibility as heir and amassing personal fortune, he reframes the competition as a revived Chojin Olympics, weaponizing its legacy to publicly undermine the Kinniku dynasty.

His machinations intertwine with the rise of the Poison Six Pack, a coalition of rogue Chojin who abduct Mantaro’s allies to escalate hostilities. While Ikemen Muscle avoids direct combat, his strategic oversight of the tournament fuels chaos, pressuring Mantaro to defend his heritage. By engineering these trials, he becomes an unseen force testing Mantaro’s resilience, transforming the Grand Prix into both a battleground for succession and a stage for his rival’s evolution as a solitary warrior.